SMTN would have you believe that Villa del arco is worth up to $45K on the resale market. But of course, resales are listed for $995 or less....essentially free.
I think you'll be much happier learning to live and love your timeshare. Most owners report good reviews from the villa group.....
Sorry, As others have noted: turn lemons into lemonade and enjoy that beverage with your family and friends. The price of memories and time spent with family is priceless.
Good luck.....
You can post in the Mexican forum for additional feedback....actual resale value/attraction depends on type of ownership; BBB will have info that might enlighten you in the MX threads....